rsvman2 It's similar to Ben Simmons shooting free throws. He probably makes 70% or more in practice.
I think that's true of almost all the notoriously bad Ft shooters, Rodman, Ben Wallace, maybe Shaq. I remember Wilt telling a story where the Lakers hired a psychologist to work on FT shooting with him for 6 weeks. Wilt said "After 6 weeks the psychologist was a better FT shooter than I was "